Mounting for air-feed drills.



W. PRELLWITZ.

MOUNTING FOR AIR FEED DRILLS. APPLIOATION FILED MAY 25, L909. 1,01 9,361

2 m 11 ro n is W44 ea; 6.1.

W. PRELLWITZ.

MOUNTING FOR AIR FEED DRILLS. APPLICATION FILED MAY 25, 1909..

1,019,361. PatentedMar.5,1912.

2 SHEBTSSHEET tlNTTE STATES PATENT QFFTCE.

WILLIAM PRELLWITZ, OF EAS'ION, PENNSYLVANIA, ASSIGNOR TO INGERSOLL-HANDCOMPANY, OF NEW YORK, N. Y., ACOR-PORATION OF NEW JERSEY.

MOUNTING FOR AIR-FEED DRILLS.

To all whom it may concern Be it known that I, lVILLIAM PRELLWITZ, acitizen of the United States, and a resident of Easton, in the county ofNorthampton and State of Pennsylvania, have invented a new and usefulMounting for Air-Feed Drills, of which the following is a specification.

My invention relates to a mounting for air feed drills in which abracket is employed to secure ways to a main support, a cross headconnecting the ways being utilized as a support for the air feedcylinder,

. the feed piston being secured to the head block and a guide ring beingfitted with guides to slide along the ways while permitting the drill tobe oscillated by the operator.

In the accompanying drawings, Figure 1 is a top plan view of an air feeddrill attached to a branch support from a column, the column being shownin cross section. Fig. 2 is a view of the same in side elevation, Fig. 3is an end View looking from left to right as the drawing, Fig. 2, isheld. Fig. 4 is a transverse section in the plane of the line A-A, Fig.2, through the steel, sl1owing the tool or machine in end elevation.Fig. 5 is a transverse section in the plane of the line BB, Fig. 2..Fig. 6 is a view of the guide ring in detail in perspective. Fig. 7 isa transverse section showing a modified form of guide ring and bracket.Figs. 8 and 9 show in side elevation and top plan respectively, views indetail of the bracket shown in cross section in Fig. 7, and

Fig. 10 is an end view of another form of bracket.

The column here represented as forming the primary support, is denotedby 1 and is made extensible by a screw section 2. The branch support isdenoted by 3 and is constructed to be clamped to the column 1 byclamping sections 4 and 5 and their bolts 6 and 7 the clamping section 5being provided with a half socket 8 extending at an angle to clampingsection 5, for cooperating with a half section 9 and bolts 10 and 11, tohold the branch support 3 in proper re lation to the column 1.

The bracket for supporting the ways along which the tool or machineslides is denoted by 12 and consists of a trunk terminating at thebottomin a flat cone 13, and

' Specification of Letters Patent.

Application filed May 25, 1909.

Patented Mar. 5, 1912.

Serial No. 498,202.

branches, in the present instance four branches, denoted by 14, 15, 16,17, extending outwardly and upwardly from the trunk and provided withV-shaped grooves or recesses 18 for the reception of the V- shaped ways19, 20. The ways 19, 20, may be extended in opposite directions beyondthe arms of the bracket 12 to any feasible distance, thereby lengtheningthe extent of the feed movement of the tool without great increase inweight. g The ways 19, 20, are connected at one end by a cross head 21provided with a central hollow hub 22 in the outer end of which the feedcylinder 23 of the air feed tool or machine is fixedly secured.

The tubular piston 24 of the air feed tool or machine is fixed to thehead block 25 and passes through the hub 22 of the cross head i 21 andinto the air feed cylinder 23, in which it has an air-tight sliding fit.

The body of the tool or machine has a rocking movement in a guide ring26, the latter being provided with V-shaped guides 2'7, 28, see Figs. 4-and 5, fitted to slide in the ways 19, 20. lVhile the guide ring 26serves to support the greater part of the weight of the tool or machine,the latter is held steady by the bearing of the tubular piston 24 withinthe air feed cylinder 23 fixed to the cross head 21.

The two-part skeleton support for the tool or machine is light, handyand eliicient and provides for materially lengthening the extent of feedmovement of the tool or machine without great increase of weight. Theways and their cross head also form a convenient and effective supportfor the air feed cylinder and the guide ring while supporting the toolor machine and guiding it along the ways during its feed movement alsoprovides for a suflicient amount of rocking or oscillating movement tokeep the tool cutting to advantage.

The cone base 13 of the trunk of the bracket 12, is looked to the branchsupport 3 by a pair of clamping elements 29, 30, hinged together at 31,and locked in clamping position by a bolt 32 hinged to the element 30 at33, and a third element 34; held in position by a bolt 35, the elements30 and 34: being provided with aws to overlap the opposite edges of thecone base, in a manner well known in the art.

In Figs. 7 to 9 inclusive, a bracket 36 is shown constructed to receivea guide ring 37 having its guides 38, 39, arranged in a plane below thecentral horizontal plane and the trunk 40 of the bracket is extended incylindrical form and provided with a retaining groove 41.

The form of bracket shown in Fig. 10 differs from that shown in Fig. 8only in extending the way supporting arms upwardly and outwardly in amanner quite similar to that shown in Figs. 1 to 4: inclusive.

What I claim is:

1. In mining apparatus a drill support comprising ways, a cross-headconnecting the ways and forming a support for an air feed cylinder and aguide ring fitted to slide along the ways and forming a supportfor adrill cylinder, the drill cylinder being fitted to rock within the saidguide ring.

2. In mining apparatus, a drill support comprising a bracket, waysattached to and projecting in opposite directions from the bracket, across-head connecting the ways l/VILLIAM PRELLWITZ.

lVitnesses F. GEORGE BARRY, C. S. SUNDGREN.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. G.

